199967887

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{17387}}^1$

素因数の和:17478

約数の個数: 16

約数和(自身を含む): 240371712

約数和(自身を除く): 40403825

約数列:

[1, 7, 31, 53, 217, 371, 1643, 11501, 17387, 121709, 538997, 921511, 3772979, 6450577, 28566841, 199967887]

約数ペア:

[(1, 199967887), (7, 28566841), (31, 6450577), (53, 3772979), (217, 921511), (371, 538997), (1643, 121709), (11501, 17387)]